Spousal support is calculated based on multiple factors outlined in California Family Code Section 4320, including the length of the marriage, each spouse’s income and earning capacity, the standard of living during the marriage, and each spouse’s age and health. Unlike child support, there’s no fixed formula for permanent spousal support; judges have broad discretion to weigh factors like whether one spouse supported the other’s education, any history of domestic violence, and the supported spouse’s ability to eventually become self-sufficient. Speaking with an alimony lawyer is often the best way to understand how these factors apply to your case. Many courts use a temporary formula (often 40% of the higher earner’s net income minus 50% of the lower earner’s net income) during divorce proceedings, but permanent support is determined case-by-case.